(If you’ve found this via searching, you may enjoy the entire series of R articles, found via the navigation link on the right, R Statistical System. These are all in “somewhat random notes” style, but they’ve been helpful to me in the past. Feel free to ping me with updates or suggestions.)

?extract talks about how to pull out specific parts of a matrix/grid
Probably should move these to the R Wiki Links page

Search Engines Dedicated to RR-Seek has some nice features, including different tabs for different results types.

R MultiSearch gives 3 search boxes, one for Google, Swiki, and Rollyo, all aimed at R sites. BTW, this one searches Baron’s site (see below)

R Site Search by Jonathon Baron. Pretty good, but getting a bit long in the tooth. Includes most R documents, functions, and R-help mail archives including R-help, R-sig-geo, and R-sig-mixed-models messages.

Data Mining With Rattle and R Book gives both good stats stuff, and tells how to use the Rattle GUI which is a cool little tool. This is an entire book, but a bit hard to read page to page because of too many “splits” of content.